Well packer



Feb. 18, 1941. J. M. HAMILTN 2,232,325

WELL PACKER Filed May 18, 1940 2 SheelsfSheef'I 1 n H I f Im lll' H i!!! mi!! Illml Y John M; Hamlron,

au 3% g N@ w Feb. 18, 1941. .1, M. HAMILTON WELL PACKER 2 Sheets-Sheet Filed May 18, 1940 aan@ Fei.. ira-i941 v' l l 2,232,325.

UNITED STATES PATENT OFFICE WELL'PACKER .mim-M. Hamilton, Odessa, Tex. application May is, i940, seriaiNo. 336,028 soiaiiiis.` (clics-41o) My invention relates to improvements in well nected to the upper and lower ends of the lower packers and has as one of the principal objects and interjacent sections respectivelyas at Il. thereof the provision of a well packer or device The inner face of the side I of the shell is so constructed and arranged whereby the same circumspatially arranged with respect to the low- 5 may be readily actuated to packor seal a well er portion I0 and coacts with the periphery of the under practical conditions, portion I0 to define a plunger chamber 16. l'Ifhe Another object of my invention is to provide a plungerA Chamber I6 has disposed therein (aS 111l1S- packer of the above described character which is trated in Figure 1) an elongated eXpandable Pack- `eapable of being readily expanded into engageer-sleeve or plunger Il slidably mounted about the ment with the weil wail or the like in a manner to portion 10 The Sleeve l1 is 0f a nrmal dlameter f isolate the oil bearing stratum from water either Slightly. in excess of the inside diameter of the above or below the stratum and thus permit if shell' to maintain the. sleeve sllghtlycompressed desired, the casing or tube to be perforated 0p therein to form asllding. seal with sald shell posite the stratum to admit inow of the oil. The Shell superlacent lts base 15 formed Wlth a A further object of m'y invention is to pmrecurvate portion I 8 to define a seat I9 for the latter vide a acker of the above described character lower e nd of the Sleeve n to mamtam the equippe with means whereby said packer may be in spatiality with the base. The lower end of the expanded and maintained in expandedy position. portion I0, between the base and the sleeve, is pro- A special Objet my invention is to provide a vided with a plurality of ports through which packer so Constructed and arranged whereby the iiuid is forced into the shell to actuate the plunger 20,

leeve upwardly within the shell and in exwell may be chemically treated while packed. or s- An portant object of my invention is to pr0 panded condition over the portionA 9. Due to the rotundity of the portion 9, it serves to dispose the vide a packer of the character described which is phmgerm compressed and sealed relation, against 2 simple in construction durable in use: -emclent the well wall W to effect packing of the well as 2B in operatic? and economical' in malnufacture y clearly illustrated in Figure 2 of the drawings.

other obJects .and advantages wm be apparfmt In order to limit the upward movement of the from the followmg. descrip/mon appended claflms plunger, the lower end of the upper section 6 of and annxed drawmgsi h rk f the tube has fixed thereto a collar 2I for engage- Referrmg to Phe draw, ngs W erem 1 e re eren@ ment with the upward end of the plunger. 80 charactxfs deslgnate hke parts throughout the The upper end of the shell is provided with a Several Vl'ew: j t plurality of outlet openings or ports 22 through Flgmfe 1 vs a s lde elevfitlon of my uwer? ion which the fluid escapes, thus, when said ports 22 partly in section, illustrating the same positioned 'are Opened by the upward movement 0f the plung- Wltrfm a' Wen y er further actuation of the plunger is precluded.

Ftgure 2 is a' View slmllajr to Flgure l'butmus' The bore of the plunger I1 is formed with an intertra'mg the Packer'sleeve m @,Xpanded 905mm?- jacent concave portion 23 to effect firm seating Flgure 3 1S an enlargedlsassembled ertlcal with the section when actuated thereover. The sectional view of my invention. plunger may be actuated into the shell from the 40 Figure 4 1S a' top Plan VleW taken 0n the 1m@ 4 4 portion 9 by means of a suitable tool (not shown) 0f Flgure 3- inserted into the well andengaging and applying Figure 5 is a sectional view taken on the line pressure to the upper end of the plunger. i 5-5 of Figure 3. a In order to chemically treat the well wall, for In practicing my invention, in the embedlmenb instance by applying acid to a porous section adillustrated in JEhe drawings, I Provide 9 Casing jacent a lime section to increase the porosity of 5.3

or tube 5 having upper, lower and interjacent the lime section,r acid is` forced into the shell and sections 6, l and 8 respectively, with the latter outwardly through the ports 22, the iatter being connecting the former together. The interjacent positioned-in proxlmity tothe section to be treated. section 8 is fashioned with upper and lower por- It is to be understood that the acid is introduced tions 9 and I0 respectively and which are threadinto the top of the tube with the bottom closed edly connected together as at II, said upper por; in a suitable manner, for instance by a disk contion being formed convexly protuberant and of a structed of a brittle and fragile material, the latrotund ellipsonic contour. The lower portion I0 ter being of a sufficient strength to resist the presis disposed within an elongated cotyloid shell I2 sure of the acid. When a disk of this type is em-i having its base or bottom I3 threadedly conplayed, the disk is ruptured or broken to open the end of the tube, upon completion of the treatment, by means of a suitable weight impacted thereagainst.

Inasmuch as the disk construction forms no part of the present invention per se, a more detailed disclosure'of the same is not believed necessary.

From the foregoingit will be apparent that I have provided a simple and efficient form of packer which readily lends itself to various uses in conjunction with the operation and drilling of wells.

The terms upper, lower and "bottom are employed in a relative sense for purposes of description and without intent of limiting the invention thereby as it will be apparent that the structure may be inverted or otherwise disposed whereby such terms might not so clearly apply as when the structure is disposed in the manner illustrated in the drawings.

Without further elaboration, the foregoing will so fully explain the invention that others may, by applying current knowledge, readily adapt the same for use under various conditions of service. Moreover, it is not indispensable that all the features of the invention be used conjointly since they may be employed advantageously in various combinations and sub-combinations.

It is obvious that the invention is not confined to the herein described use therefor as it may be utilized for any purpose to which it is adaptable. It is therefore to be understood that the invention is not limited to the specific construction as illustrated and described as the same is only illustrative of the principles of operation, which are cap-able of extended application in various forms, and thattheinvention comprehends all construction within the scope of the appended claims.

What I claim is:

1. A device of 'the character described comprising a tube having upper, lower and interjacent sections with the latter connecting the former together, a shell carried by said interjacent section and coacting with thev latter to dene a plunger chamber therearound, 'an expandable plunger normally disposed in said chamber and slidably operated ona'said tube out of said chamber, said interjacent'section formed with a convexly protuberant Aportion superjacent said chamber for receiving and expanding said plunger thereon when the latter is actuated out of said chamber and with said portion coacting with said plunger to dispose the latter in sealing engagement with a well wall.

2. A device f the character described comprising aA tube having upper, lower and interjacent sections with the latter connecting the former together, a shell carried by said interjacent section and coacting with the latter to dene a plunger chamber therearound, an expandable plunger normally disposed in said chamber and slidably operated on said tube out of said chamber, said interjacent section formed with a convexly protuberant portion superjacent said chamber for receiving and expanding said plunger thereon when the latter is actuated out of said chamber and with said portion coacting with said plunger to dispose the latter in sealing engagement with a Vwell wall, said tube provided with ports communicating with said 'chamber for introducing uid Within said chamber for actuatingl said together, a shell carried by said interjacent section and coacting with the latter to dene a. plunger chamber therearound, an expandable plunger normally disposed in said chamber and slidably operated on said tube out of said chamber, said interjacent section formed with a convexly protube'rant portion superjacent said chamber for receiving and expanding said plunger thereon when the latter is actuated out of said chamber and with said portion coacting with said plunger to dispose the latter in sealing engagement with a well wall, and means carried by said tube adjacent said portion for engaging said plunger when actuated out of said chamber to position and maintain said plunger over said portion.

4. A device of the character described comprising a tube having upper, lower and interjacent sections with the latter connecting the former together, a shell carried by said interjacent section and coacting` with the latter to define a plunger chamber therearound, an expandable plunger normally disposed in said chamber and slidably operated on said tube out of said chamber, said interjacent section formed with a convexly protuberant portion superjacent said chamber for receiving and expanding salid plunger thereon when the latter is actuated out of said chamber and with said portion coacting with said plunger to dispose the latter in sealing engagement with a well wall, said tube provided with ports communicating with said chamber for introducing ,iiuid within said chamber for actuating said plunger over said portion, and means carried by said tube adjacent said portion for engaging said plunger when actuated out of said chamber to position and maintain said plunger over said portion.

5. In combination with a well tube, a packer connected in said tube and having a pair of oppositely disposed portions with one of said portions of a greater diameter than the other and constituting an expander, a housing connected to said tube adjacent said expander and circumspatially with the other portion, an expandable sleeve slidably mounted in said housing and having an inside diameter exceeded by said first mentioned diameter to eiect expansion of said sleeve when the latter is actuated over said expander from said housing, and means for introducing uid within said housing for actuating said sleeve.

6. A packer adapted to be connected in a well tube and formed with a pair of oppositely disposed portions with one of said portions of a greater diameter than the other and constituting an expander, a housing connected to said packer adjacent said expander and circumspatially with the other portion, an expandable sleeve slidably mounted in said housing and having an inside diameter exceeded by said first mentioned diameter for eiecting expansion of said sleeve when the latter is actuated over said expander from said housing, and means for introducing fluid within said housing for actuating said sleeve.

JOHN M. HAMILTON. 

